I picked this up from the library because I realised I knew absolutely nothing about St George, other than he's our Patron Saint and he slew the dragon. 

I found this lil book really interesting, read it in basically an afternoon but it was jam-packed full of theories on who the original St George might have been, how the mythologies and legends grew - and where they may have come from. It's more about the history of the stories around St George than an actual history but still a really good read